REFRACTIVE INDEX DISTRIBUTION MEASURING METHOD AND REFRACTIVE INDEX DISTRIBUTION MEASURING APPARATUS

摘要

PURPOSE: A method and a device for measuring refractive index profile is provided to accurately produce optical elements even if the optical elements are formed using a glass material with high refractive index. CONSTITUTION: A method for measuring refractive index profile is as follows. An object(40) is arranged on a first medium which has a lower refractive index than the object. The first penetrated wave surface of the object is measured by irradiating a reference beam to the object. The object is arranged on a second medium which has a refractive index different from the first medium. the second penetrated wave surface of the object is measured by irradiating a reference beam to the object. The inner refractive index profile of the object is computed.